Dec, I9I4-] Cockerell: Bees From Ecuador and Peru. 315 



much broader, the bare part of pleura much larger, the band on 

 second abdominal segment more widely interrupted, etc. Among the 

 North American species it resembles T. suhlnnatus Ckll. as closely 

 as any. 



Ceratina triangulifera new species. 



Female. — Length about 9 mm. ; bright peacock green, with slight golden 

 tints on metathorax, and bases of second and third abdominal segments, except 

 at sides, dark, with purple tints ; no lateral face-marks ; clypeus with a large 

 white apical triangular area, which is continued on each side as a narrow 

 stripe ; labrvim black ; mandibles black, with a green spot at base ; flagelluni 

 with a very obscure testaceous tint beneath ; face and front densely and 

 coarsely punctured ; cheeks with large punctures, except the upper part be- 

 hind, which is smooth and impunctate ; mesothorax strongly punctured, with 

 a smooth discal area ; tubercles green ; tegulae dull rufotestaceous ; wings 

 reddish-hyaline ; coxae, and hind femora and trochanters in front, green, legs 

 otherwise piceous, but the anterior knees, and stripe on anterior tibia;, white; 

 abdomen well punctured, rugose apically as usual. 



Habitat. — Guayaquil {v. Bnchzvald; Alfken coll. 28). 



A distinct species, resembling C. viridula Sm., but that has green 

 legs. In H. S. Smith's key (Trans. Am. Ent. Soc, 1907, p. 119) it 

 runs out at 19. In Schrottky's key (Zeits. Hym. Dipt., 1907, p. 480) 

 it runs nearest to C. oxalidis, which it does not resemble. The general 

 appearance is that of C. laeta Spin., which is however much larger, 

 and otherwise different. 



Centris nitida geminata new subspecies. 



Female. — Length about 13 mm.; anterior wing 10 mm.; black, the thorax 

 above with dense canary-yellow hair, which extends also down the sides, but 

 gives way to white ventrally ; head broad, eyes dark brown ; flagellum fer- 

 ruginous beneath, except at base and apex ; face-marks light yellow, as follows : 

 lateral marks very narrow, ending in a sharp point above at about level of 

 antennae ; clypeus with two very large oblique yellow patches, separated by a 

 dark vertical band in middle ; labrum and greater part of mandibles very pale 

 yellow; hair of cheeks white below, but above and on occiput yellow; hair 

 of vertex black, yellow between ocelli ; hair of front yellow, black at extreme 

 sides; clypeus shining, with rather small punctures, flattened in middle, with 

 a short rudimentary keel; scutellum shining with well-separated punctures; 

 tegute pale ferruginous; wings strongly suffused with brown, nervures dark; 

 legs black, anterior tarsi red at apex; anterior and middle femora and tibiae 

 with white hair behind; middle tibiae short and thick, with short black hair 

 in front; front tarsi with ferruginous hair on inner side, and whitish (strongly 

 plumose) on outer; middle tarsi with black hair, the basitarsus also with long 



